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Hello,
i am about to build a test setup where i have a mobile contact head that has a cable with PC3.5mm (male) connection.
The measurment equipment has a SMA (feemale) connector.
So i am wondering if PC3.5mm are compatible with the SMA type connectors?
Can i connect the PC3.5 male to the...
I came back with some new result, after updating the resistor values, the plots changed
This is my new circuit
After ploting the response i have the following curves.
I am a bit confused here, the -3db point is much higher in frequency and much lower in phase than the -45 phase.
Why...
Hello,
the goal for this was just to see a practical approach to help me understand bode plots, and how they are affect my circuit. So i started out just ploting a freq response from datasheet
To be honest, 4 days ago i had no idea what the phase response in the bode plot means, i knew its...
Hello,
i have a circuit where i try to understand how bode plot works..
Bellow is the schematic, the opamp circuit has a Gain of 2,
I am feeding a 200mhz sinewave into the circuit, bellow is the phase and gain .
Phase
Gain
For 200mhz i have a phase shift of -19,98degrees, and a...
Hello,
i am working on a script which translates some odb++ pcb file, and passes out a altium pcb document.
I dont know or cannot generate nets for the placed pads.
How can i create a net from the script?
I tried like this:
NetList : TStringList;
NetList.Add := 'MyNet';
But i...
Re: Unsigned variable overflows in C
lets say i have a set point value of 100 (rpm) and a simple P controler like bellow
int KP = 1
int error = setpoint - actual
int pid = KP * error
lets say the actual speed of the motor is 50, based on this, the error value should be +50, therefore...
Hello,
i have a mcu application written in C language using IAR compiler, and i encounter some issues with a output variable type.
The PID outputs the result in signed integer, and a variable for controlling a duty cycle register is unsigned int.
Variable initialisation
int pid =0...
Re: 3 hall sensors speed measurement
Hello,
i promised to come back with results, generally speaking things work much better than the old design.
Bellow you can see the noise on the 3.3V line for the mcu, measured with the "original long crocodile wire" of the scope probe.
The noise is...
Hello, i have a system which controls a 3 phase BLDC motor. The speed of the motor is read trough 3 hall sensors.
For controling the sistem, i have two timers with their own ISR/Interrupt handlers.
Timer1 ISR - i manage the dutycycle and the comutation of the motor phases, this ISR runs at...
Hello,
i am trying to create a damped sine wave like the noise generated from a pwm power stage.
The waveform must look similar to this
Is this posible in Orcad simulation ?
Hello FvM,
a good point which for the moment i missed out, i will reroute the ground layer, so the layer brakes just at the power transistors terminal, then the signals coming from the mosfet drivers, should be under the same "signal" ground.
What is very challenging is that i also try to...
The main reason why the power stage is not placed on the edge of the board, is because i use TO220 package and i need room for the radiator, plus on the edge of the board there is a screw type terminal connector
Keeping this "L" shape for the ground of the power stage transistors, i...
Hello,
i am working on a 4 layer pcb design on a circuit to drive a 3 phase bldc motor.
After some previous noise problems on my 2 layer design, i cam to the point where i want to go for a 4 layer.
So i have started working on the new pcb layout..
The goal is to minimize as much as possible...
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